/**
 * marked - a markdown parser
 * Copyright (c) 2011-2014, Christopher Jeffrey. (MIT Licensed)
 * https://github.com/markedjs/marked
 */

(function (root) {
  'use strict'

  /**
   * Block-Level Grammar
   */

  var block = {
    newline: /^\n+/,
    code: /^( {4}[^\n]+\n*)+/,
    fences: noop,
    hr: /^ {0,3}((?:- *){3,}|(?:_ *){3,}|(?:\* *){3,})(?:\n+|$)/,
    heading: /^ *(#{1,6}) *([^\n]+?) *(?:#+ *)?(?:\n+|$)/,
    nptable: noop,
    blockquote: /^( {0,3}> ?(paragraph|[^\n]*)(?:\n|$))+/,
    list: /^( *)(bull) [\s\S]+?(?:hr|def|\n{2,}(?! )(?!\1bull )\n*|\s*$)/,
    html:
      '^ {0,3}(?:' + // optional indentation
      '<(script|pre|style)[\\s>][\\s\\S]*?(?:</\\1>[^\\n]*\\n+|$)' + // (1)
      '|comment[^\\n]*(\\n+|$)' + // (2)
      '|<\\?[\\s\\S]*?\\?>\\n*' + // (3)
      '|<![A-Z][\\s\\S]*?>\\n*' + // (4)
      '|<!\\[CDATA\\[[\\s\\S]*?\\]\\]>\\n*' + // (5)
      '|</?(tag)(?: +|\\n|/?>)[\\s\\S]*?(?:\\n{2,}|$)' + // (6)
      '|<(?!script|pre|style)([a-z][\\w-]*)(?:attribute)*? */?>(?=\\h*\\n)[\\s\\S]*?(?:\\n{2,}|$)' + // (7) open tag
      '|</(?!script|pre|style)[a-z][\\w-]*\\s*>(?=\\h*\\n)[\\s\\S]*?(?:\\n{2,}|$)' + // (7) closing tag
      ')',
    def: /^ {0,3}\[(label)\]: *\n? *<?([^\s>]+)>?(?:(?: +\n? *| *\n *)(title))? *(?:\n+|$)/,
    table: noop,
    lheading: /^([^\n]+)\n *(=|-){2,} *(?:\n+|$)/,
    paragraph: /^([^\n]+(?:\n(?!hr|heading|lheading| {0,3}>|<\/?(?:tag)(?: +|\n|\/?>)|<(?:script|pre|style|!--))[^\n]+)*)/,
    text: /^[^\n]+/
  }

  block._label = /(?!\s*\])(?:\\[\[\]]|[^\[\]])+/
  block._title = /(?:"(?:\\"?|[^"\\])*"|'[^'\n]*(?:\n[^'\n]+)*\n?'|\([^()]*\))/
  block.def = edit(block.def)
    .replace('label', block._label)
    .replace('title', block._title)
    .getRegex()

  block.bullet = /(?:[*+-]|\d+\.)/
  block.item = /^( *)(bull) [^\n]*(?:\n(?!\1bull )[^\n]*)*/
  block.item = edit(block.item, 'gm')
    .replace(/bull/g, block.bullet)
    .getRegex()

  block.list = edit(block.list)
    .replace(/bull/g, block.bullet)
    .replace(
      'hr',
      '\\n+(?=\\1?(?:(?:- *){3,}|(?:_ *){3,}|(?:\\* *){3,})(?:\\n+|$))'
    )
    .replace('def', '\\n+(?=' + block.def.source + ')')
    .getRegex()

  block._tag =
    'address|article|aside|base|basefont|blockquote|body|caption' +
    '|center|col|colgroup|dd|details|dialog|dir|div|dl|dt|fieldset|figcaption' +
    '|figure|footer|form|frame|frameset|h[1-6]|head|header|hr|html|iframe' +
    '|legend|li|link|main|menu|menuitem|meta|nav|noframes|ol|optgroup|option' +
    '|p|param|section|source|summary|table|tbody|td|tfoot|th|thead|title|tr' +
    '|track|ul'
  block._comment = /<!--(?!-?>)[\s\S]*?-->/
  block.html = edit(block.html, 'i')
    .replace('comment', block._comment)
    .replace('tag', block._tag)
    .replace(
      'attribute',
      / +[a-zA-Z:_][\w.:-]*(?: *= *"[^"\n]*"| *= *'[^'\n]*'| *= *[^\s"'=<>`]+)?/
    )
    .getRegex()

  block.paragraph = edit(block.paragraph)
    .replace('hr', block.hr)
    .replace('heading', block.heading)
    .replace('lheading', block.lheading)
    .replace('tag', block._tag) // pars can be interrupted by type (6) html blocks
    .getRegex()

  block.blockquote = edit(block.blockquote)
    .replace('paragraph', block.paragraph)
    .getRegex()

  /**
   * Normal Block Grammar
   */

  block.normal = merge({}, block)

  /**
   * GFM Block Grammar
   */

  block.gfm = merge({}, block.normal, {
    fences: /^ *(`{3,}|~{3,})[ \.]*(\S+)? *\n([\s\S]*?)\n? *\1 *(?:\n+|$)/,
    paragraph: /^/,
    heading: /^ *(#{1,6}) +([^\n]+?) *#* *(?:\n+|$)/
  })

  block.gfm.paragraph = edit(block.paragraph)
    .replace(
      '(?!',
      '(?!' +
        block.gfm.fences.source.replace('\\1', '\\2') +
        '|' +
        block.list.source.replace('\\1', '\\3') +
        '|'
    )
    .getRegex()

  /**
   * GFM + Tables Block Grammar
   */

  block.tables = merge({}, block.gfm, {
    nptable: /^ *([^|\n ].*\|.*)\n *([-:]+ *\|[-| :]*)(?:\n((?:.*[^>\n ].*(?:\n|$))*)\n*|$)/,
    table: /^ *\|(.+)\n *\|?( *[-:]+[-| :]*)(?:\n((?: *[^>\n ].*(?:\n|$))*)\n*|$)/
  })

  /**
   * Pedantic grammar
   */

  block.pedantic = merge({}, block.normal, {
    html: edit(
      '^ *(?:comment *(?:\\n|\\s*$)' +
      '|<(tag)[\\s\\S]+?</\\1> *(?:\\n{2,}|\\s*$)' + // closed tag
        "|<tag(?:\"[^\"]*\"|'[^']*'|\\s[^'\"/>\\s]*)*?/?> *(?:\\n{2,}|\\s*$))"
    )
      .replace('comment', block._comment)
      .replace(
        /tag/g,
        '(?!(?:' +
          'a|em|strong|small|s|cite|q|dfn|abbr|data|time|code|var|samp|kbd|sub' +
          '|sup|i|b|u|mark|ruby|rt|rp|bdi|bdo|span|br|wbr|ins|del|img)' +
          '\\b)\\w+(?!:|[^\\w\\s@]*@)\\b'
      )
      .getRegex(),
    def: /^ *\[([^\]]+)\]: *<?([^\s>]+)>?(?: +(["(][^\n]+[")]))? *(?:\n+|$)/
  })

  /**
   * Block Lexer
   */

  function Lexer (options) {
    this.tokens = []
    this.tokens.links = Object.create(null)
    this.options = options || marked.defaults
    this.rules = block.normal

    if (this.options.pedantic) {
      this.rules = block.pedantic
    } else if (this.options.gfm) {
      if (this.options.tables) {
        this.rules = block.tables
      } else {
        this.rules = block.gfm
      }
    }
  }

  /**
   * Expose Block Rules
   */

  Lexer.rules = block

  /**
   * Static Lex Method
   */

  Lexer.lex = function (src, options) {
    var lexer = new Lexer(options)
    return lexer.lex(src)
  }

  /**
   * Preprocessing
   */

  Lexer.prototype.lex = function (src) {
    src = src
      .replace(/\r\n|\r/g, '\n')
      .replace(/\t/g, '    ')
      .replace(/\u00a0/g, ' ')
      .replace(/\u2424/g, '\n')

    return this.token(src, true)
  }

  /**
   * Lexing
   */

  Lexer.prototype.token = function (src, top) {
    src = src.replace(/^ +$/gm, '')
    var next,
      loose,
      cap,
      bull,
      b,
      item,
      listStart,
      listItems,
      t,
      space,
      i,
      tag,
      l,
      isordered,
      istask,
      ischecked

    while (src) {
      // newline
      if ((cap = this.rules.newline.exec(src))) {
        src = src.substring(cap[0].length)
        if (cap[0].length > 1) {
          this.tokens.push({
            type: 'space'
          })
        }
      }

      // code
      if ((cap = this.rules.code.exec(src))) {
        src = src.substring(cap[0].length)
        cap = cap[0].replace(/^ {4}/gm, '')
        this.tokens.push({
          type: 'code',
          text: !this.options.pedantic ? rtrim(cap, '\n') : cap
        })
        continue
      }

      // fences (gfm)
      if ((cap = this.rules.fences.exec(src))) {
        src = src.substring(cap[0].length)
        this.tokens.push({
          type: 'code',
          lang: cap[2],
          text: cap[3] || ''
        })
        continue
      }

      // heading
      if ((cap = this.rules.heading.exec(src))) {
        src = src.substring(cap[0].length)
        this.tokens.push({
          type: 'heading',
          depth: cap[1].length,
          text: cap[2]
        })
        continue
      }

      // table no leading pipe (gfm)
      if (top && (cap = this.rules.nptable.exec(src))) {
        item = {
          type: 'table',
          header: splitCells(cap[1].replace(/^ *| *\| *$/g, '')),
          align: cap[2].replace(/^ *|\| *$/g, '').split(/ *\| */),
          cells: cap[3] ? cap[3].replace(/\n$/, '').split('\n') : []
        }

        if (item.header.length === item.align.length) {
          src = src.substring(cap[0].length)

          for (i = 0; i < item.align.length; i++) {
            if (/^ *-+: *$/.test(item.align[i])) {
              item.align[i] = 'right'
            } else if (/^ *:-+: *$/.test(item.align[i])) {
              item.align[i] = 'center'
            } else if (/^ *:-+ *$/.test(item.align[i])) {
              item.align[i] = 'left'
            } else {
              item.align[i] = null
            }
          }

          for (i = 0; i < item.cells.length; i++) {
            item.cells[i] = splitCells(item.cells[i], item.header.length)
          }

          this.tokens.push(item)

          continue
        }
      }

      // hr
      if ((cap = this.rules.hr.exec(src))) {
        src = src.substring(cap[0].length)
        this.tokens.push({
          type: 'hr'
        })
        continue
      }

      // blockquote
      if ((cap = this.rules.blockquote.exec(src))) {
        src = src.substring(cap[0].length)

        this.tokens.push({
          type: 'blockquote_start'
        })

        cap = cap[0].replace(/^ *> ?/gm, '')

        // Pass `top` to keep the current
        // "toplevel" state. This is exactly
        // how markdown.pl works.
        this.token(cap, top)

        this.tokens.push({
          type: 'blockquote_end'
        })

        continue
      }

      // list
      if ((cap = this.rules.list.exec(src))) {
        src = src.substring(cap[0].length)
        bull = cap[2]
        isordered = bull.length > 1

        listStart = {
          type: 'list_start',
          ordered: isordered,
          start: isordered ? +bull : '',
          loose: false
        }

        this.tokens.push(listStart)

        // Get each top-level item.
        cap = cap[0].match(this.rules.item)

        listItems = []
        next = false
        l = cap.length
        i = 0

        for (; i < l; i++) {
          item = cap[i]

          // Remove the list item's bullet
          // so it is seen as the next token.
          space = item.length
          item = item.replace(/^ *([*+-]|\d+\.) +/, '')

          // Outdent whatever the
          // list item contains. Hacky.
          if (~item.indexOf('\n ')) {
            space -= item.length
            item = !this.options.pedantic
              ? item.replace(new RegExp('^ {1,' + space + '}', 'gm'), '')
              : item.replace(/^ {1,4}/gm, '')
          }

          // Determine whether the next list item belongs here.
          // Backpedal if it does not belong in this list.
          if (this.options.smartLists && i !== l - 1) {
            b = block.bullet.exec(cap[i + 1])[0]
            if (bull !== b && !(bull.length > 1 && b.length > 1)) {
              src = cap.slice(i + 1).join('\n') + src
              i = l - 1
            }
          }

          // Determine whether item is loose or not.
          // Use: /(^|\n)(?! )[^\n]+\n\n(?!\s*$)/
          // for discount behavior.
          loose = next || /\n\n(?!\s*$)/.test(item)
          if (i !== l - 1) {
            next = item.charAt(item.length - 1) === '\n'
            if (!loose) loose = next
          }

          if (loose) {
            listStart.loose = true
          }

          // Check for task list items
          istask = /^\[[ xX]\] /.test(item)
          ischecked = undefined
          if (istask) {
            ischecked = item[1] !== ' '
            item = item.replace(/^\[[ xX]\] +/, '')
          }

          t = {
            type: 'list_item_start',
            task: istask,
            checked: ischecked,
            loose: loose
          }

          listItems.push(t)
          this.tokens.push(t)

          // Recurse.
          this.token(item, false)

          this.tokens.push({
            type: 'list_item_end'
          })
        }

        if (listStart.loose) {
          l = listItems.length
          i = 0
          for (; i < l; i++) {
            listItems[i].loose = true
          }
        }

        this.tokens.push({
          type: 'list_end'
        })

        continue
      }

      // html
      if ((cap = this.rules.html.exec(src))) {
        src = src.substring(cap[0].length)
        this.tokens.push({
          type: this.options.sanitize ? 'paragraph' : 'html',
          pre:
            !this.options.sanitizer &&
            (cap[1] === 'pre' || cap[1] === 'script' || cap[1] === 'style'),
          text: cap[0]
        })
        continue
      }

      // def
      if (top && (cap = this.rules.def.exec(src))) {
        src = src.substring(cap[0].length)
        if (cap[3]) cap[3] = cap[3].substring(1, cap[3].length - 1)
        tag = cap[1].toLowerCase().replace(/\s+/g, ' ')
        if (!this.tokens.links[tag]) {
          this.tokens.links[tag] = {
            href: cap[2],
            title: cap[3]
          }
        }
        continue
      }

      // table (gfm)
      if (top && (cap = this.rules.table.exec(src))) {
        item = {
          type: 'table',
          header: splitCells(cap[1].replace(/^ *| *\| *$/g, '')),
          align: cap[2].replace(/^ *|\| *$/g, '').split(/ *\| */),
          cells: cap[3] ? cap[3].replace(/(?: *\| *)?\n$/, '').split('\n') : []
        }

        if (item.header.length === item.align.length) {
          src = src.substring(cap[0].length)

          for (i = 0; i < item.align.length; i++) {
            if (/^ *-+: *$/.test(item.align[i])) {
              item.align[i] = 'right'
            } else if (/^ *:-+: *$/.test(item.align[i])) {
              item.align[i] = 'center'
            } else if (/^ *:-+ *$/.test(item.align[i])) {
              item.align[i] = 'left'
            } else {
              item.align[i] = null
            }
          }

          for (i = 0; i < item.cells.length; i++) {
            item.cells[i] = splitCells(
              item.cells[i].replace(/^ *\| *| *\| *$/g, ''),
              item.header.length
            )
          }

          this.tokens.push(item)

          continue
        }
      }

      // lheading
      if ((cap = this.rules.lheading.exec(src))) {
        src = src.substring(cap[0].length)
        this.tokens.push({
          type: 'heading',
          depth: cap[2] === '=' ? 1 : 2,
          text: cap[1]
        })
        continue
      }

      // top-level paragraph
      if (top && (cap = this.rules.paragraph.exec(src))) {
        src = src.substring(cap[0].length)
        this.tokens.push({
          type: 'paragraph',
          text:
            cap[1].charAt(cap[1].length - 1) === '\n'
              ? cap[1].slice(0, -1)
              : cap[1]
        })
        continue
      }

      // text
      if ((cap = this.rules.text.exec(src))) {
        // Top-level should never reach here.
        src = src.substring(cap[0].length)
        this.tokens.push({
          type: 'text',
          text: cap[0]
        })
        continue
      }

      if (src) {
        throw new Error('Infinite loop on byte: ' + src.charCodeAt(0))
      }
    }

    return this.tokens
  }

  /**
   * Inline-Level Grammar
   */

  var inline = {
    escape: /^\\([!"#$%&'()*+,\-./:;<=>?@\[\]\\^_`{|}~])/,
    autolink: /^<(scheme:[^\s\x00-\x1f<>]*|email)>/,
    url: noop,
    tag:
      '^comment' +
      '|^</[a-zA-Z][\\w:-]*\\s*>' + // self-closing tag
      '|^<[a-zA-Z][\\w-]*(?:attribute)*?\\s*/?>' + // open tag
      '|^<\\?[\\s\\S]*?\\?>' + // processing instruction, e.g. <?php ?>
      '|^<![a-zA-Z]+\\s[\\s\\S]*?>' + // declaration, e.g. <!DOCTYPE html>
      '|^<!\\[CDATA\\[[\\s\\S]*?\\]\\]>', // CDATA section
    link: /^!?\[(label)\]\(href(?:\s+(title))?\s*\)/,
    reflink: /^!?\[(label)\]\[(?!\s*\])((?:\\[\[\]]?|[^\[\]\\])+)\]/,
    nolink: /^!?\[(?!\s*\])((?:\[[^\[\]]*\]|\\[\[\]]|[^\[\]])*)\](?:\[\])?/,
    strong: /^__([^\s])__(?!_)|^\*\*([^\s])\*\*(?!\*)|^__([^\s][\s\S]*?[^\s])__(?!_)|^\*\*([^\s][\s\S]*?[^\s])\*\*(?!\*)/,
    em: /^_([^\s_])_(?!_)|^\*([^\s*"<\[])\*(?!\*)|^_([^\s][\s\S]*?[^\s_])_(?!_)|^_([^\s_][\s\S]*?[^\s])_(?!_)|^\*([^\s"<\[][\s\S]*?[^\s*])\*(?!\*)|^\*([^\s*"<\[][\s\S]*?[^\s])\*(?!\*)/,
    code: /^(`+)\s*([\s\S]*?[^`]?)\s*\1(?!`)/,
    br: /^( {2,}|\\)\n(?!\s*$)/,
    del: noop,
    text: /^[\s\S]+?(?=[\\<!\[`*]|\b_| {2,}\n|$)/
  }

  inline._escapes = /\\([!"#$%&'()*+,\-./:;<=>?@\[\]\\^_`{|}~])/g

  inline._scheme = /[a-zA-Z][a-zA-Z0-9+.-]{1,31}/
  inline._email = /[a-zA-Z0-9.!#$%&'*+/=?^_`{|}~-]+(@)[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?(?:\.[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?)+(?![-_])/
  inline.autolink = edit(inline.autolink)
    .replace('scheme', inline._scheme)
    .replace('email', inline._email)
    .getRegex()

  inline._attribute = /\s+[a-zA-Z:_][\w.:-]*(?:\s*=\s*"[^"]*"|\s*=\s*'[^']*'|\s*=\s*[^\s"'=<>`]+)?/

  inline.tag = edit(inline.tag)
    .replace('comment', block._comment)
    .replace('attribute', inline._attribute)
    .getRegex()

  inline._label = /(?:\[[^\[\]]*\]|\\[\[\]]?|`[^`]*`|[^\[\]\\])*?/
  inline._href = /\s*(<(?:\\[<>]?|[^\s<>\\])*>|(?:\\[()]?|\([^\s\x00-\x1f\\]*\)|[^\s\x00-\x1f()\\])*?)/
  inline._title = /"(?:\\"?|[^"\\])*"|'(?:\\'?|[^'\\])*'|\((?:\\\)?|[^)\\])*\)/

  inline.link = edit(inline.link)
    .replace('label', inline._label)
    .replace('href', inline._href)
    .replace('title', inline._title)
    .getRegex()

  inline.reflink = edit(inline.reflink)
    .replace('label', inline._label)
    .getRegex()

  /**
   * Normal Inline Grammar
   */

  inline.normal = merge({}, inline)

  /**
   * Pedantic Inline Grammar
   */

  inline.pedantic = merge({}, inline.normal, {
    strong: /^__(?=\S)([\s\S]*?\S)__(?!_)|^\*\*(?=\S)([\s\S]*?\S)\*\*(?!\*)/,
    em: /^_(?=\S)([\s\S]*?\S)_(?!_)|^\*(?=\S)([\s\S]*?\S)\*(?!\*)/,
    link: edit(/^!?\[(label)\]\((.*?)\)/)
      .replace('label', inline._label)
      .getRegex(),
    reflink: edit(/^!?\[(label)\]\s*\[([^\]]*)\]/)
      .replace('label', inline._label)
      .getRegex()
  })

  /**
   * GFM Inline Grammar
   */

  inline.gfm = merge({}, inline.normal, {
    escape: edit(inline.escape)
      .replace('])', '~|])')
      .getRegex(),
    url: edit(
      /^((?:ftp|https?):\/\/|www\.)(?:[a-zA-Z0-9\-]+\.?)+[^\s<]*|^email/
    )
      .replace('email', inline._email)
      .getRegex(),
    _backpedal: /(?:[^?!.,:;*_~()&]+|\([^)]*\)|&(?![a-zA-Z0-9]+;$)|[?!.,:;*_~)]+(?!$))+/,
    del: /^~+(?=\S)([\s\S]*?\S)~+/,
    text: edit(inline.text)
      .replace(']|', '~]|')
      .replace(
        '|',
        "|https?://|ftp://|www\\.|[a-zA-Z0-9.!#$%&'*+/=?^_`{\\|}~-]+@|"
      )
      .getRegex()
  })

  /**
   * GFM + Line Breaks Inline Grammar
   */

  inline.breaks = merge({}, inline.gfm, {
    br: edit(inline.br)
      .replace('{2,}', '*')
      .getRegex(),
    text: edit(inline.gfm.text)
      .replace('{2,}', '*')
      .getRegex()
  })

  /**
   * Inline Lexer & Compiler
   */

  function InlineLexer (links, options) {
    this.options = options || marked.defaults
    this.links = links
    this.rules = inline.normal
    this.renderer = this.options.renderer || new Renderer()
    this.renderer.options = this.options

    if (!this.links) {
      throw new Error('Tokens array requires a `links` property.')
    }

    if (this.options.pedantic) {
      this.rules = inline.pedantic
    } else if (this.options.gfm) {
      if (this.options.breaks) {
        this.rules = inline.breaks
      } else {
        this.rules = inline.gfm
      }
    }
  }

  /**
   * Expose Inline Rules
   */

  InlineLexer.rules = inline

  /**
   * Static Lexing/Compiling Method
   */

  InlineLexer.output = function (src, links, options) {
    var inline = new InlineLexer(links, options)
    return inline.output(src)
  }

  /**
   * Lexing/Compiling
   */

  InlineLexer.prototype.output = function (src) {
    var out = ''
    var link
    var text
    var href
    var title
    var cap
    var prevCapZero

    while (src) {
      // escape
      if ((cap = this.rules.escape.exec(src))) {
        src = src.substring(cap[0].length)
        out += cap[1]
        continue
      }

      // autolink
      if ((cap = this.rules.autolink.exec(src))) {
        src = src.substring(cap[0].length)
        if (cap[2] === '@') {
          text = escape(this.mangle(cap[1]))
          href = 'mailto:' + text
        } else {
          text = escape(cap[1])
          href = text
        }
        out += this.renderer.link(href, null, text)
        continue
      }

      // url (gfm)
      if (!this.inLink && (cap = this.rules.url.exec(src))) {
        do {
          prevCapZero = cap[0]
          cap[0] = this.rules._backpedal.exec(cap[0])[0]
        } while (prevCapZero !== cap[0])
        src = src.substring(cap[0].length)
        if (cap[2] === '@') {
          text = escape(cap[0])
          href = 'mailto:' + text
        } else {
          text = escape(cap[0])
          if (cap[1] === 'www.') {
            href = 'http://' + text
          } else {
            href = text
          }
        }
        out += this.renderer.link(href, null, text)
        continue
      }

      // tag
      if ((cap = this.rules.tag.exec(src))) {
        if (!this.inLink && /^<a /i.test(cap[0])) {
          this.inLink = true
        } else if (this.inLink && /^<\/a>/i.test(cap[0])) {
          this.inLink = false
        }
        src = src.substring(cap[0].length)
        out += this.options.sanitize
          ? this.options.sanitizer
            ? this.options.sanitizer(cap[0])
            : escape(cap[0])
          : cap[0]
        continue
      }

      // link
      if ((cap = this.rules.link.exec(src))) {
        src = src.substring(cap[0].length)
        this.inLink = true
        href = cap[2]
        if (this.options.pedantic) {
          link = /^([^'"]*[^\s])\s+(['"])(.*)\2/.exec(href)

          if (link) {
            href = link[1]
            title = link[3]
          } else {
            title = ''
          }
        } else {
          title = cap[3] ? cap[3].slice(1, -1) : ''
        }
        href = href.trim().replace(/^<([\s\S]*)>$/, '$1')
        out += this.outputLink(cap, {
          href: InlineLexer.escapes(href),
          title: InlineLexer.escapes(title)
        })
        this.inLink = false
        continue
      }

      // reflink, nolink
      if (
        (cap = this.rules.reflink.exec(src)) ||
        (cap = this.rules.nolink.exec(src))
      ) {
        src = src.substring(cap[0].length)
        link = (cap[2] || cap[1]).replace(/\s+/g, ' ')
        link = this.links[link.toLowerCase()]
        if (!link || !link.href) {
          out += cap[0].charAt(0)
          src = cap[0].substring(1) + src
          continue
        }
        this.inLink = true
        out += this.outputLink(cap, link)
        this.inLink = false
        continue
      }

      // strong
      if ((cap = this.rules.strong.exec(src))) {
        src = src.substring(cap[0].length)
        out += this.renderer.strong(
          this.output(cap[4] || cap[3] || cap[2] || cap[1])
        )
        continue
      }

      // em
      if ((cap = this.rules.em.exec(src))) {
        src = src.substring(cap[0].length)
        out += this.renderer.em(
          this.output(cap[6] || cap[5] || cap[4] || cap[3] || cap[2] || cap[1])
        )
        continue
      }

      // code
      if ((cap = this.rules.code.exec(src))) {
        src = src.substring(cap[0].length)
        out += this.renderer.codespan(escape(cap[2].trim(), true))
        continue
      }

      // br
      if ((cap = this.rules.br.exec(src))) {
        src = src.substring(cap[0].length)
        out += this.renderer.br()
        continue
      }

      // del (gfm)
      if ((cap = this.rules.del.exec(src))) {
        src = src.substring(cap[0].length)
        out += this.renderer.del(this.output(cap[1]))
        continue
      }

      // text
      if ((cap = this.rules.text.exec(src))) {
        src = src.substring(cap[0].length)
        out += this.renderer.text(escape(this.smartypants(cap[0])))
        continue
      }

      if (src) {
        throw new Error('Infinite loop on byte: ' + src.charCodeAt(0))
      }
    }

    return out
  }

  InlineLexer.escapes = function (text) {
    return text ? text.replace(InlineLexer.rules._escapes, '$1') : text
  }

  /**
   * Compile Link
   */

  InlineLexer.prototype.outputLink = function (cap, link) {
    var href = link.href
    var title = link.title ? escape(link.title) : null

    return cap[0].charAt(0) !== '!'
      ? this.renderer.link(href, title, this.output(cap[1]))
      : this.renderer.image(href, title, escape(cap[1]))
  }

  /**
   * Smartypants Transformations
   */

  InlineLexer.prototype.smartypants = function (text) {
    if (!this.options.smartypants) return text
    return (
      text
        // em-dashes
        .replace(/---/g, '\u2014')
        // en-dashes
        .replace(/--/g, '\u2013')
        // opening singles
        .replace(/(^|[-\u2014/(\[{"\s])'/g, '$1\u2018')
        // closing singles & apostrophes
        .replace(/'/g, '\u2019')
        // opening doubles
        .replace(/(^|[-\u2014/(\[{\u2018\s])"/g, '$1\u201c')
        // closing doubles
        .replace(/"/g, '\u201d')
        // ellipses
        .replace(/\.{3}/g, '\u2026')
    )
  }

  /**
   * Mangle Links
   */

  InlineLexer.prototype.mangle = function (text) {
    if (!this.options.mangle) return text
    var out = ''
    var l = text.length
    var i = 0
    var ch

    for (; i < l; i++) {
      ch = text.charCodeAt(i)
      if (Math.random() > 0.5) {
        ch = 'x' + ch.toString(16)
      }
      out += '&#' + ch + ';'
    }

    return out
  }

  /**
   * Renderer
   */

  function Renderer (options) {
    this.options = options || marked.defaults
  }

  Renderer.prototype.code = function (code, lang, escaped) {
    if (this.options.highlight) {
      var out = this.options.highlight(code, lang)
      if (out != null && out !== code) {
        escaped = true
        code = out
      }
    }

    if (!lang) {
      return (
        '<pre><code>' + (escaped ? code : escape(code, true)) + '</code></pre>'
      )
    }

    return (
      '<pre><code class="' +
      this.options.langPrefix +
      escape(lang, true) +
      '">' +
      (escaped ? code : escape(code, true)) +
      '</code></pre>\n'
    )
  }

  Renderer.prototype.blockquote = function (quote) {
    return '<blockquote>\n' + quote + '</blockquote>\n'
  }

  Renderer.prototype.html = function (html) {
    return html
  }

  Renderer.prototype.heading = function (text, level, raw) {
    if (this.options.headerIds) {
      return (
        '<h' +
        level +
        ' id="' +
        this.options.headerPrefix +
        raw.toLowerCase().replace(/[^\w]+/g, '-') +
        '">' +
        text +
        '</h' +
        level +
        '>\n'
      )
    }
    // ignore IDs
    return '<h' + level + '>' + text + '</h' + level + '>\n'
  }

  Renderer.prototype.hr = function () {
    return this.options.xhtml ? '<hr/>\n' : '<hr>\n'
  }

  Renderer.prototype.list = function (body, ordered, start) {
    var type = ordered ? 'ol' : 'ul'
    var startatt = ordered && start !== 1 ? ' start="' + start + '"' : ''
    return '<' + type + startatt + '>\n' + body + '</' + type + '>\n'
  }

  Renderer.prototype.listitem = function (text) {
    return '<li>' + text + '</li>\n'
  }

  Renderer.prototype.checkbox = function (checked) {
    return (
      '<input ' +
      (checked ? 'checked="" ' : '') +
      'disabled="" type="checkbox"' +
      (this.options.xhtml ? ' /' : '') +
      '> '
    )
  }

  Renderer.prototype.paragraph = function (text) {
    return '<p>' + text + '</p>\n'
  }

  Renderer.prototype.table = function (header, body) {
    if (body) body = '<tbody>' + body + '</tbody>'

    return (
      '<table>\n' + '<thead>\n' + header + '</thead>\n' + body + '</table>\n'
    )
  }

  Renderer.prototype.tablerow = function (content) {
    return '<tr>\n' + content + '</tr>\n'
  }

  Renderer.prototype.tablecell = function (content, flags) {
    var type = flags.header ? 'th' : 'td'
    var tag = flags.align
      ? '<' + type + ' align="' + flags.align + '">'
      : '<' + type + '>'
    return tag + content + '</' + type + '>\n'
  }

  // span level renderer
  Renderer.prototype.strong = function (text) {
    return '<strong>' + text + '</strong>'
  }

  Renderer.prototype.em = function (text) {
    return '<em>' + text + '</em>'
  }

  Renderer.prototype.codespan = function (text) {
    return '<code>' + text + '</code>'
  }

  Renderer.prototype.br = function () {
    return this.options.xhtml ? '<br/>' : '<br>'
  }

  Renderer.prototype.del = function (text) {
    return '<del>' + text + '</del>'
  }

  Renderer.prototype.link = function (href, title, text) {
    if (this.options.sanitize) {
      try {
        var prot = decodeURIComponent(unescape(href))
          .replace(/[^\w:]/g, '')
          .toLowerCase()
      } catch (e) {
        return text
      }
      if (
        prot.indexOf('javascript:') === 0 ||
        prot.indexOf('vbscript:') === 0 ||
        prot.indexOf('data:') === 0
      ) {
        return text
      }
    }
    if (this.options.baseUrl && !originIndependentUrl.test(href)) {
      href = resolveUrl(this.options.baseUrl, href)
    }
    try {
      href = encodeURI(href).replace(/%25/g, '%')
    } catch (e) {
      return text
    }
    var out = '<a href="' + escape(href) + '"'
    if (title) {
      out += ' title="' + title + '"'
    }
    out += '>' + text + '</a>'
    return out
  }

  Renderer.prototype.image = function (href, title, text) {
    if (this.options.baseUrl && !originIndependentUrl.test(href)) {
      href = resolveUrl(this.options.baseUrl, href)
    }
    var out = '<img src="' + href + '" alt="' + text + '"'
    if (title) {
      out += ' title="' + title + '"'
    }
    out += this.options.xhtml ? '/>' : '>'
    return out
  }

  Renderer.prototype.text = function (text) {
    return text
  }

  /**
   * TextRenderer
   * returns only the textual part of the token
   */

  function TextRenderer () {}

  // no need for block level renderers

  TextRenderer.prototype.strong = TextRenderer.prototype.em = TextRenderer.prototype.codespan = TextRenderer.prototype.del = TextRenderer.prototype.text = function (
    text
  ) {
    return text
  }

  TextRenderer.prototype.link = TextRenderer.prototype.image = function (
    href,
    title,
    text
  ) {
    return '' + text
  }

  TextRenderer.prototype.br = function () {
    return ''
  }

  /**
   * Parsing & Compiling
   */

  function Parser (options) {
    this.tokens = []
    this.token = null
    this.options = options || marked.defaults
    this.options.renderer = this.options.renderer || new Renderer()
    this.renderer = this.options.renderer
    this.renderer.options = this.options
  }

  /**
   * Static Parse Method
   */

  Parser.parse = function (src, options) {
    var parser = new Parser(options)
    return parser.parse(src)
  }

  /**
   * Parse Loop
   */

  Parser.prototype.parse = function (src) {
    this.inline = new InlineLexer(src.links, this.options)
    // use an InlineLexer with a TextRenderer to extract pure text
    this.inlineText = new InlineLexer(
      src.links,
      merge({}, this.options, { renderer: new TextRenderer() })
    )
    this.tokens = src.reverse()

    var out = ''
    while (this.next()) {
      out += this.tok()
    }

    return out
  }

  /**
   * Next Token
   */

  Parser.prototype.next = function () {
    return (this.token = this.tokens.pop())
  }

  /**
   * Preview Next Token
   */

  Parser.prototype.peek = function () {
    return this.tokens[this.tokens.length - 1] || 0
  }

  /**
   * Parse Text Tokens
   */

  Parser.prototype.parseText = function () {
    var body = this.token.text

    while (this.peek().type === 'text') {
      body += '\n' + this.next().text
    }

    return this.inline.output(body)
  }

  /**
   * Parse Current Token
   */

  Parser.prototype.tok = function () {
    switch (this.token.type) {
      case 'space': {
        return ''
      }
      case 'hr': {
        return this.renderer.hr()
      }
      case 'heading': {
        return this.renderer.heading(
          this.inline.output(this.token.text),
          this.token.depth,
          unescape(this.inlineText.output(this.token.text))
        )
      }
      case 'code': {
        return this.renderer.code(
          this.token.text,
          this.token.lang,
          this.token.escaped
        )
      }
      case 'table': {
        var header = ''
        var body = ''
        var i
        var row
        var cell
        var j

        // header
        cell = ''
        for (i = 0; i < this.token.header.length; i++) {
          cell += this.renderer.tablecell(
            this.inline.output(this.token.header[i]),
            { header: true, align: this.token.align[i] }
          )
        }
        header += this.renderer.tablerow(cell)

        for (i = 0; i < this.token.cells.length; i++) {
          row = this.token.cells[i]

          cell = ''
          for (j = 0; j < row.length; j++) {
            cell += this.renderer.tablecell(this.inline.output(row[j]), {
              header: false,
              align: this.token.align[j]
            })
          }

          body += this.renderer.tablerow(cell)
        }
        return this.renderer.table(header, body)
      }
      case 'blockquote_start': {
        body = ''

        while (this.next().type !== 'blockquote_end') {
          body += this.tok()
        }

        return this.renderer.blockquote(body)
      }
      case 'list_start': {
        body = ''
        var ordered = this.token.ordered
        var start = this.token.start

        while (this.next().type !== 'list_end') {
          body += this.tok()
        }

        return this.renderer.list(body, ordered, start)
      }
      case 'list_item_start': {
        body = ''
        var loose = this.token.loose

        if (this.token.task) {
          body += this.renderer.checkbox(this.token.checked)
        }

        while (this.next().type !== 'list_item_end') {
          body +=
            !loose && this.token.type === 'text'
              ? this.parseText()
              : this.tok()
        }

        return this.renderer.listitem(body)
      }
      case 'html': {
        // TODO parse inline content if parameter markdown=1
        return this.renderer.html(this.token.text)
      }
      case 'paragraph': {
        return this.renderer.paragraph(this.inline.output(this.token.text))
      }
      case 'text': {
        return this.renderer.paragraph(this.parseText())
      }
    }
  }

  /**
   * Helpers
   */

  function escape (html, encode) {
    return html
      .replace(!encode ? /&(?!#?\w+;)/g : /&/g, '&amp;')
      .replace(/</g, '&lt;')
      .replace(/>/g, '&gt;')
      .replace(/"/g, '&quot;')
      .replace(/'/g, '&#39;')
  }

  function unescape (html) {
    // explicitly match decimal, hex, and named HTML entities
    return html.replace(/&(#(?:\d+)|(?:#x[0-9A-Fa-f]+)|(?:\w+));?/gi, function (
      _,
      n
    ) {
      n = n.toLowerCase()
      if (n === 'colon') return ':'
      if (n.charAt(0) === '#') {
        return n.charAt(1) === 'x'
          ? String.fromCharCode(parseInt(n.substring(2), 16))
          : String.fromCharCode(+n.substring(1))
      }
      return ''
    })
  }

  function edit (regex, opt) {
    regex = regex.source || regex
    opt = opt || ''
    return {
      replace: function (name, val) {
        val = val.source || val
        val = val.replace(/(^|[^\[])\^/g, '$1')
        regex = regex.replace(name, val)
        return this
      },
      getRegex: function () {
        return new RegExp(regex, opt)
      }
    }
  }

  function resolveUrl (base, href) {
    if (!baseUrls[' ' + base]) {
      // we can ignore everything in base after the last slash of its path component,
      // but we might need to add _that_
      // https://tools.ietf.org/html/rfc3986#section-3
      if (/^[^:]+:\/*[^/]*$/.test(base)) {
        baseUrls[' ' + base] = base + '/'
      } else {
        baseUrls[' ' + base] = rtrim(base, '/', true)
      }
    }
    base = baseUrls[' ' + base]

    if (href.slice(0, 2) === '//') {
      return base.replace(/:[\s\S]*/, ':') + href
    } else if (href.charAt(0) === '/') {
      return base.replace(/(:\/*[^/]*)[\s\S]*/, '$1') + href
    } else {
      return base + href
    }
  }
  var baseUrls = {}
  var originIndependentUrl = /^$|^[a-z][a-z0-9+.-]*:|^[?#]/i

  function noop () {}
  noop.exec = noop

  function merge (obj) {
    var i = 1
    var target
    var key

    for (; i < arguments.length; i++) {
      target = arguments[i]
      for (key in target) {
        if (Object.prototype.hasOwnProperty.call(target, key)) {
          obj[key] = target[key]
        }
      }
    }

    return obj
  }

  function splitCells (tableRow, count) {
    // ensure that every cell-delimiting pipe has a space
    // before it to distinguish it from an escaped pipe
    var row = tableRow.replace(/\|/g, function (match, offset, str) {
      var escaped = false
      var curr = offset
      while (--curr >= 0 && str[curr] === '\\') escaped = !escaped
      if (escaped) {
        // odd number of slashes means | is escaped
        // so we leave it alone
        return '|'
      } else {
        // add space before unescaped |
        return ' |'
      }
    })
    var cells = row.split(/ \|/)
    var i = 0

    if (cells.length > count) {
      cells.splice(count)
    } else {
      while (cells.length < count) cells.push('')
    }

    for (; i < cells.length; i++) {
      // leading or trailing whitespace is ignored per the gfm spec
      cells[i] = cells[i].trim().replace(/\\\|/g, '|')
    }
    return cells
  }

  // Remove trailing 'c's. Equivalent to str.replace(/c*$/, '').
  // /c*$/ is vulnerable to REDOS.
  // invert: Remove suffix of non-c chars instead. Default falsey.
  function rtrim (str, c, invert) {
    if (str.length === 0) {
      return ''
    }

    // Length of suffix matching the invert condition.
    var suffLen = 0

    // Step left until we fail to match the invert condition.
    while (suffLen < str.length) {
      var currChar = str.charAt(str.length - suffLen - 1)
      if (currChar === c && !invert) {
        suffLen++
      } else if (currChar !== c && invert) {
        suffLen++
      } else {
        break
      }
    }

    return str.substr(0, str.length - suffLen)
  }

  /**
   * Marked
   */

  function marked (src, opt, callback) {
    // throw error in case of non string input
    if (typeof src === 'undefined' || src === null) {
      throw new Error('marked(): input parameter is undefined or null')
    }
    if (typeof src !== 'string') {
      throw new Error(
        'marked(): input parameter is of type ' +
          Object.prototype.toString.call(src) +
          ', string expected'
      )
    }

    if (callback || typeof opt === 'function') {
      if (!callback) {
        callback = opt
        opt = null
      }

      opt = merge({}, marked.defaults, opt || {})

      var highlight = opt.highlight
      var tokens
      var pending
      var i = 0

      try {
        tokens = Lexer.lex(src, opt)
      } catch (e) {
        return callback(e)
      }

      pending = tokens.length

      var done = function (err) {
        if (err) {
          opt.highlight = highlight
          return callback(err)
        }

        var out

        try {
          out = Parser.parse(tokens, opt)
        } catch (e) {
          err = e
        }

        opt.highlight = highlight

        return err ? callback(err) : callback(null, out)
      }

      if (!highlight || highlight.length < 3) {
        return done()
      }

      delete opt.highlight

      if (!pending) return done()

      for (; i < tokens.length; i++) {
        (function (token) {
          if (token.type !== 'code') {
            return --pending || done()
          }
          return highlight(token.text, token.lang, function (err, code) {
            if (err) return done(err)
            if (code == null || code === token.text) {
              return --pending || done()
            }
            token.text = code
            token.escaped = true
            --pending || done()
          })
        })(tokens[i])
      }

      return
    }
    try {
      if (opt) opt = merge({}, marked.defaults, opt)
      return Parser.parse(Lexer.lex(src, opt), opt)
    } catch (e) {
      e.message +=
        '\nPlease report this to https://github.com/markedjs/marked.'
      if ((opt || marked.defaults).silent) {
        return (
          '<p>An error occurred:</p><pre>' +
          escape(e.message + '', true) +
          '</pre>'
        )
      }
      throw e
    }
  }

  /**
   * Options
   */

  marked.options = marked.setOptions = function (opt) {
    merge(marked.defaults, opt)
    return marked
  }

  marked.getDefaults = function () {
    return {
      baseUrl: null,
      breaks: false,
      gfm: true,
      headerIds: true,
      headerPrefix: '',
      highlight: null,
      langPrefix: 'language-',
      mangle: true,
      pedantic: false,
      renderer: new Renderer(),
      sanitize: false,
      sanitizer: null,
      silent: false,
      smartLists: false,
      smartypants: false,
      tables: true,
      xhtml: false
    }
  }

  marked.defaults = marked.getDefaults()

  /**
   * Expose
   */

  marked.Parser = Parser
  marked.parser = Parser.parse

  marked.Renderer = Renderer
  marked.TextRenderer = TextRenderer

  marked.Lexer = Lexer
  marked.lexer = Lexer.lex

  marked.InlineLexer = InlineLexer
  marked.inlineLexer = InlineLexer.output

  marked.parse = marked

  if (typeof module !== 'undefined' && typeof exports === 'object') {
    module.exports = marked
  } else if (typeof define === 'function' && define.amd) {
    define(function () {
      return marked
    })
  } else {
    root.marked = marked
  }
})(this || (typeof window !== 'undefined' ? window : global))
